A167578 - OEIS

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A167578

The third column of the ED3 array A167572

1, 17, 183, 2043, 26529, 398025, 6765975, 128556675, 2699661825, 62092533825, 1552309291575, 41912411683275, 1215458905032225, 37679245697871225, 1243414695550433175, 43519523831289457875, 1610222144582102522625 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	LINKS	`Table of n, a(n) for n=1..17.`
	FORMULA	`a(n) = (1/4)(-1)^(n)(2n-7)!!((8n^4-20n^3-22n^2+55n+12)+(32n^5-80n^4-80n^3+200n^2+18n-45)(sum((-1)^(k+n)/(2*k+1),k=0..n-1)))`
	CROSSREFS	`Equals the third column of the ED3 array A167572.` `Other columns are A167576 and A167577.` `Cf. A007509 and A025547 (the sum((-1)^(k+n)/(2k+1), k=0..n-1) factor).` `Sequence in context: A066521 A055904 A116964 A181401 A025958 A199674` `Adjacent sequences: A167575 A167576 A167577 * A167579 A167580 A167581`
	KEYWORD	`easy,nonn`
	AUTHOR	`Johannes W. Meijer, Nov 10 2009`
	STATUS	`approved`

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Last modified May 24 05:31 EDT 2013. Contains 225617 sequences.